AWWA WQTC64159

This slide presentation outlines a study to create an external link between disinfection byproduct (DBP) and chlorine decaymodels and an EPANET 2 hydraulic model.Specific objectives included:to predict DBP formation and chlorine decay in a networkunder steady and unsteady state conditions;to assess how water quality and treatment conditions affect theformation of DBPs; and,to define DBP isopleths and estimate chemical risks at nodes. U.S. Environmental Protection Agency USEPA) empirical models for chlorine decay and DBPsprediction were selected as water quality models for thisstudy because they were developed from a wide range of natural sources andembody a large database, and theyconsider water quality and treatment conditionsthat affect the formation of DBPs. Conclusions were that:it is possible to link DBP models and EPANET 2model externally for direct simulation of DBPformation in distribution networks and for estimatingchemical risks;it is possible to minimize DBPs in a network by themodeling approach; and,the model is useful in selecting the location of boosterchlorination points to maintain the minimum requiredchlorine residual in the network. Recommendations included:realistic and well calibrated hydraulic models areneeded for optimizing and accurately predicting DBPformations in a distribution network; and, since EPANET 2 has limitations in predicting THMformation, integrating USEPA DBP models withEPANET 2 internally will make EPANET 2 a veryrobust model for predicting DBPs. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2006

Number of Pages:

24

File Size:

1 file , 470 KB